diff --git a/qt/scientific_interfaces/test/ISISReflectometry/Common/DecoderTest.h b/qt/scientific_interfaces/test/ISISReflectometry/Common/DecoderTest.h
index a35b7d10c6a00a637f65e5a2df4ba90878defe7c..a9e6ec8193db7ca1e553454f7c0131fb18ee3775 100644
--- a/qt/scientific_interfaces/test/ISISReflectometry/Common/DecoderTest.h
+++ b/qt/scientific_interfaces/test/ISISReflectometry/Common/DecoderTest.h
@@ -11,7 +11,7 @@
 #include "../../../ISISReflectometry/GUI/Common/Decoder.h"
 #include "../ReflMockObjects.h"
 #include "CoderCommonTester.h"
-#include "MantidAPI/FrameworkManager.h"
+#include "MantidPythonInterface/core/WrapPython.h"
 #include "MantidQtWidgets/Common/QtJSONUtils.h"
 
 #include <cxxtest/TestSuite.h>
@@ -168,7 +168,10 @@ public:
   static DecoderTest *createSuite() { return new DecoderTest(); }
   static void destroySuite(DecoderTest *suite) { delete suite; }
 
-  void setUp() override { Mantid::API::FrameworkManager::Instance(); }
+  DecoderTest() {
+    PyRun_SimpleString("import mantid.api as api\n"
+                       "api.FrameworkManager.Instance()");
+  }
 
   void test_decode() {
     CoderCommonTester tester;
diff --git a/qt/scientific_interfaces/test/ISISReflectometry/Common/EncoderTest.h b/qt/scientific_interfaces/test/ISISReflectometry/Common/EncoderTest.h
index 7dde60c8ebdd19172024bf3d82d605faa4b60ad6..d22a4f438a6e4ecf8fd44ad07c4942f2b18e4712 100644
--- a/qt/scientific_interfaces/test/ISISReflectometry/Common/EncoderTest.h
+++ b/qt/scientific_interfaces/test/ISISReflectometry/Common/EncoderTest.h
@@ -11,7 +11,7 @@
 #include "../../../ISISReflectometry/GUI/Common/Encoder.h"
 #include "../ReflMockObjects.h"
 #include "CoderCommonTester.h"
-#include "MantidAPI/FrameworkManager.h"
+#include "MantidPythonInterface/core/WrapPython.h"
 
 #include <cxxtest/TestSuite.h>
 
@@ -27,7 +27,10 @@ public:
   static EncoderTest *createSuite() { return new EncoderTest(); }
   static void destroySuite(EncoderTest *suite) { delete suite; }
 
-  void setUp() override { Mantid::API::FrameworkManager::Instance(); }
+  EncoderTest() {
+    PyRun_SimpleString("import mantid.api as api\n"
+                       "api.FrameworkManager.Instance()");
+  }
 
   void test_encoder() {
     CoderCommonTester tester;